U.S. patent number 4,705,303 [Application Number 06/883,981] was granted by the patent office on 1987-11-10 for detachable hose coupling.
This patent grant is currently assigned to Askove Kunststof Industrie B.V.. Invention is credited to Joan J. A. M. van Aspert.
United States Patent |
4,705,303 |
van Aspert |
November 10, 1987 |
Detachable hose coupling
Abstract
A coupling for rapidly and detachably connecting a conduit pipe
or hose to an opening is disclosed provided with an inner sleeve
having a flange on at least one end, an outer sleeve capable of
moving with little play about the inner sleeve, a groove for a
flexible sealing member between the coupling and the opening to be
connected as well as clamping means for the relative axial movement
of inner and outer sleeve and for pressing the sealing member
tightly into the opening, whereby the inner sleeve is provided near
the flange with an inclined ascending face which can mate with a
corresponding ascending face at the outer sleeve, the outer sleeve
being furnished with a groove arranged all around it for
accommodating a sealing ring, while at least the part of the outer
sleeve in the zone of the nest for the sealing ring is capable of
flexible radial expansion, in such a way that, upon the ascending
face of the outer sleeve being pressed against the ascending face
at the inner sleeve under the action of the clamping means, the
sealing ring is thrust out radially.
Inventors: |
van Aspert; Joan J. A. M.
(Berlicum, NL) |
Assignee: |
Askove Kunststof Industrie B.V.
(NL)
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Family
ID: |
19846271 |
Appl.
No.: |
06/883,981 |
Filed: |
July 10, 1986 |
Foreign Application Priority Data
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Jul 10, 1985 [NL] |
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8501972 |
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Current U.S.
Class: |
285/309; 285/320;
285/338; 285/312; 285/322 |
Current CPC
Class: |
F16L
37/025 (20130101) |
Current International
Class: |
F16L
37/00 (20060101); F16L 37/02 (20060101); F16L
037/00 () |
Field of
Search: |
;285/312,311,310,309,308,320,338,322,170 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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1135749 |
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Nov 1982 |
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CA |
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489266 |
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Jan 1930 |
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DE2 |
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Primary Examiner: Scanlan, Jr.; Richard J.
Attorney, Agent or Firm: Stetina and Brunda
Claims
What is claimed is:
1. A coupling for rapidly and detachably connecting a conduit pipe
or hose to an opening comprising:
an inner sleeve having a flange on at least one end; and
an outer sleeve capable of moving with little play about the inner
sleeve; and
a flexible sealing ring between the outer sleeve and the opening to
be connected; and
clamping means for clamping the relative axial movement of inner
and outer sleeve and for indirectly pressing the sealing ring
tightly into the opening; and
the inner sleeve being provided near the flange with an inclination
ascending face which mates with a corresponding ascending face at
the outer sleeve, the outer sleeve being furnished with a groove
arranged all around it for accommodating the sealing ring, while at
least the part of the outer sleeve in the zone of the groove for
the sealing ring is capable of flexible radial expansion in such a
way that, upon the ascending face of the outer sleeve being pressed
against the ascending face at the inner sleeve under the action of
the clamping means, the sealing ring is thrust out radially and
pressed tightly into the opening.
2. The coupling according to claim 1, wherein the outer sleeve is
furnished with at least one slot extending axially up to the
ascending face.
3. The coupling according to claim 2, wherein the slot, at its end
facing away from the ascending face, opens into an enlarged bore in
the body of the outer sleeve.
4. The coupling according to claim 3, wherein the clamping means
are constituted by two diametrically opposite levers, hinged to the
outer sleeve, with clamping hooks, and by diametrically opposite
hooked parts mounted on the inner sleeve and projecting through
corresponding openings in the outer sleeve.
5. The coupling according to claim 4, wherein the inner sleeve, at
its end facing away from the ascending face, is directly connected
to a hose or pipe.
6. The coupling according to claim 5, wherein both the inner sleeve
and the outer sleeve are manufactured of ultraviolet-resistant
high-density polyethylene.
7. The coupling according to claim 3, wherein the clamping means
comprise springs which press the outer sleeve with its ascending
face in the direction of the ascending face of the inner
sleeve.
8. The coupling according to claim 7, wherein the inner sleeve
possesses on both ends a flange with an inclined ascending face,
and that the outer sleeve consists of two parts each for mating
with one of the flanges, each being provided with an ascending face
and a groove for a sealing ring, as well as with slots that extend
axially up to the end.
9. A coupling device for connecting a conduit to an opening
comprising:
a rigid tube affixed to the conduit end, the tube having a flange
and having an outer circumferential inclination-ascending face;
a sleeve on the tube, the sleeve having circumferential groove and
having an inner circumferential inclination-ascending face which is
complementary to the tube face, the sleeve being capable of moving
axially with little play about the tube and being capable of
flexible radial expansion in the zone of the groove;
a flexible sealing ring within the sleeve's outer circumferential
groove; and
clamping means for effecting and for clamping relative axial
movement between the tube and sleeve in order that, the ascending
face of the sleeve being pressed against the ascending face of the
tube under action of the clamping means, the sealing ring is thrust
radially outwards and is tightly pressed into a circumferentially
surrounding opening simultaneously that the tube flange is drawn
backwards in a direction from the opening and is tightly pressed
against the shoulders of the opening, forming thereby a connection.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a coupling for rapidly and
detachably connecting a conduit pipe or hose to an opening,
provided with an inner sleeve having a flange on at least one end,
an outer sleeve capable of moving with little play about the inner
sleeve, a groove for a flexible sealing member between the coupling
and the opening to be connected, as well as clamping means for the
relative axial movement of inner and outer sleeve and for pressing
the sealing member tightly into the opening.
In known types of such couplings, a rubber ring is fitted between a
flange on the inner sleeve and a flange on the outer sleeve, in
such a way that, upon the inner sleeve being moved relatively
toward the outer sleeve, the rubber ring is subjected to axial
pressure, causing it to be thrust out radially through elastic
deformation.
Such a coupling has been found not to ensure a satisfactory seal in
all conditions, and specifically not to be resistant to high axial
forces.
SUMMARY OF THE PRESENT INVENTION
The present invention aims at providing an improved and simple
coupling of the kind stated in the preamble.
To this end, it is proposed that the inner sleeve in such a
coupling be provided near the flange with an inclined ascending
face which can mate with a corresponding ascending face at the
outer sleeve, the outer sleeve being furnished with a groove
arranged all around it for accommodating a sealing ring, while at
least the part of the outer sleeve in the zone of the groove for
the sealing ring is capable of flexible radial expansion, in such a
way that, upon the ascending face of the outer sleeve being pressed
against the ascending face at the inner sleeve under the action of
the clamping means, the sealing ring is thrust out radially.
Such a coupling offers the advantage that, when the inner sleeve is
subjected to elevated axial forces, the radial outward force upon
the sealing ring is increased, thus ensuring reliable sealing and
clamping action. The coupling can nevertheless be detached rapidly
in a simple manner by moving the outer sleeve relatively to the
inner sleeve in the opposite direction.
DESCRIPTION OF THE DRAWINGS
Furthur details of the invention will become evident from the
following description of a preferred embodiment and reference to
the drawings WHEREIN:
FIG. 1 is a lateral view of a coupling according to the invention;
and
FIG. 2 is a similar view, but turned through an angle of 90 deg.,
and shown partly in longitudinal section.
FIG. 3 is an equivalent view to FIG. 2 showing the coupling of the
present invention in use for connecting to an opening.
FIG. 4 is an equivalent view to FIG. 1 showing the substitution of
springs for clamping means within the coupling of the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the figures, the coupling of the present invention
consists of an inner sleeve 1, an outer sleeve 2, and clamping
means designated by the overall reference number 3. The inner
sleeve 1 is provided, at its end which is designed as the inserting
end, with a flange 4, as well as, on the side of this flange 4
which faces away from the inserting end, with an ascending face 5.
The inner sleeve 1 is provided at its other end with a connecting
end 6, to which a hose can be fitted in a known manner.
The outer sleeve 2 is provided, at its end facing the flange 4 of
the inner sleeve 1, with a groove 7 for an O-ring 8. The outer
sleeve 2 is provided at its end with an ascending face 9,
corresponding to the ascending face 5 of the inner sleeve 1. The
outer sleeve 2 is furthermore furnished with at least one slot 10
extending axially up to the ascending face 9. At its end facing
away from the ascending face 9, this slot 10 opens into an enlarged
bore 11 in the body 12 of the outer sleeve. In the preferred
embodiment according to the invention as shown in the figures, four
bores 11 are provided in the outer sleeve 2. These bores consist of
two diametricallly opposite round bores 13 and of two likewise
diametrically opposite, elongated bores 14 arranged at right angles
to the round bores 13. The clamping means 3 are fastened on the
inner sleeve through these elongated bores 14.
The clamping means 3 are constituted by two diametrically opposite
levers 15, hinged to the outer sleeve 2, with clamping hooks 16, as
well as by diametrically opposite hooked parts 17 mounted on the
inner sleeve 1 and projecting through corresponding openings 14 in
the outer sleeve 2. The outer sleeve 2 is provided with a boss 18,
on which two diametrically opposite pairs of bearing supports 19
are secured for the pins 20. The levers 15, supported on these pins
20, act as self-locking clamping levers for clamping rods 21 that
are provided with clamping hooks 16. The length of the clamping
means 3 can be adjusted by means of a threaded setting device 22.
The clamping hooks 16 mate with corresponding hooked parts 17.
These hooks 17 are fixed by means of bolts 23 and mounting brackets
24 on the inner sleeve 1, through the elongated bores 14 in the
outer sleeve 2.
The openings 10 cause the outer sleeve 2 to be divided at its one
end into four flexible parts 25, so that, upon the ascending face 9
at the outer sleeve 2 being pressed against the ascending face 5 at
the inner sleeve under the action of the clamping means 3, the
parts 25 move outwardly from the end of the outer sleeve 2, thereby
clamping the O-ring 8 radially against the inside of the opening 27
(shown in FIG. 3) into which the inserting end of the coupling is
pressed. Force applied to the coupling from the inserting end
results in the ascending face 5, 9 being pressed more firmly
against each other, and thus in increasing the clamping force of
the O-ring 8 in the opening. The force on O-ring 8 is also
sufficient to force it into the openings 10 and against the inner
sleeve 1. The compressed O-ring 8 seals against both the inner
sleeve 1 and opening 27 (shown in FIG. 3) producing a tight
connection.
The coupling of the present invention in use for connecting to an
opening 27 is shown in FIG. 3. With respect to the connection of
the coupling to the opening 27, first the outer sleeve 2 should be
placed in the opening 27, then the inner sleeve 1 should be moved
in the outer sleeve 2. When the inner sleeve 1 is then subjected to
axial force, then the radial outward force upon the sealing ring
increases, ensuring reliable sealing and clamping action.
The radially outward movement of outer sleeve 2, albeit slight, is
illustrated in FIG. 3 as may be particularly observed from the
compression of sealing ring 8. Also in FIG. 3 an arrow 28 indicates
in which direction the outer sleeve parts 25 are moved when the
ascending face 9 at the outer sleeve is pressed against the
ascending face 5 at the inner sleeve under the action of the
clamping means 3. By means of the moving of the parts 25, the
O-ring 8 retains the coupling within an opening 27. The conduit
pipe, or hose 29 to which the coupling connects at its other end is
also shown in FIG. 3.
In the example of embodiment according to the invention, as shown
in the figures, the inner sleeve, at its end facing away from the
ascending face, is directly connected to a pipe or hose, 29 as
shown in FIG. 3. The connecting part 6 is only connected to the
remaining part of the inner sleeve 1 after the outer sleeve 2 is
fitted on the inner sleeve 1. This connection is made by means of a
welded seam 26. The outer sleeve 2 naturally can be composed
equally well of two or more parts which, having been assembled with
the inner sleeve 1, can be jointed in a prior-art manner.
The coupling is specifically designed for a rapidly detachable
joint, such as for a cooling unit to be connected to aircraft and
the like when external cooling must be applied, for example when
the aircraft engines themselves are inoperative. The inside
diameter of the inner sleeve 1 usually amounts to 70 mm. Use is
preferably made of ultraviolet-resistant high-density polyethylene
for the inner and the outer sleeve.
It is to be noted that, instead of the clamping means shown, use
can also be made of expanded and stretched pressure springs 30, as
shown in diagrammatic represntation in FIG. 4, between the end 6 of
the inner sleeve 1 and the thickened end 18 of the outer sleeve 2,
in such a way that the outer sleeve is constantly pressed in the
direction of the ascending face of the inner sleeve. In such case
provisions will have to be made, with the use of a manual or other
arrangement, for moving the outer sleeve 2 in the opposite
direction relatively to the inner sleeve 1 when the coupling is to
be detached.
Besides the example of embodiment according to the invention
described hereinabove for a clamping zone on one side, it is also
possible to equip the coupling on both sides with a corresponding
O-ring seal, so that a double-sided connector is obtained. In such
case, the connecting part 6 for the conduit pipe or hose is not
provided, the coupling being so designed with respect to the median
normal plane that the inner sleeve possesses on both ends a flange
with an inclined ascending face, and that the outer sleeve consists
of two parts, each of these parts, for mating with one of the
flanges, being provided with an ascending face and a groove nest
for a sealing ring, as well as with slots that extend axially up to
the end. It is also possible, however, for the outer sleeve to
constitute one whole part, and for the inner sleeve to consist of
several parts.
* * * * *